What is the use of bar bracket in bodmas.

Simplify:$15-6+10-2$

Find the value of  $15÷3+5\times 9-25$

Simplify the following numerical expression:

$28÷4-7+2$

Simplify the following numerical expressions:

$40÷5-3$

Simplify the following numerical expression.

$4\frac{1}{10}-\left[2\frac{1}{2}-\left\{\frac{5}{6}-\left(\frac{2}{5}+\frac{3}{10}-\frac{4}{15}\right)\right\}\right]$

Simplify the following numerical expression:

$54-17+9$

Simplify the numerical expression: $34217+1335-28143$

Simplify the following numerical expressions:

$32-45÷5+3$

Simplify the following numerical expression:

$48-39+150$

Simplify the following numerical expression.

$67+9\left[20-24÷8\right]$

Simplify the following numerical expression

$7\frac{1}{3}÷\frac{2}{3}\text{ of }2\frac{1}{5}+1\frac{3}{8}÷2\frac{3}{4}-1\frac{1}{2}$

Simplify the following numerical expressions:

$8+66÷\frac{3}{4}$  of $44+9$